Music leaf turner



July 4, 1944. R. o. AGURCIA MUSIC LEAF TURNER Filed Dec. 27, 194i 7' Sheets-Sheet 1 July 4,: 1944.

R. D. AGURCIA 2,352,605

MUSIC LEAF TURNER Filed Dec. 27, 1941 7 Sheets-Sheet 2 L k) Inventor Attorney R. D. AGURCIA MUSIC LEAF TURNER July 4, 1944.

Filed Dec. 27, 1941 '7 Sheets-Sheet 1f- Inventor A Home July 4, 1944. R. D. AGURCIA MUSIC LEAF TURNER Filed- Dec. 27, 1941 7 Sheets-Sheet, 4

Imlentor ez @zorczkb Attorney July 4, 1944. R. D. AGURCIA MUSIC LEAF TURNER Filed Dec. 27, l94l 7 Sheets-$heet 5 Aflorney July 4, 1944. R. D. AGURCIA MUSIC LEAF TURNER Filed Dc. 27, 1941 "7 Sheets-Sheet 6 Ilm NW N\\ Inventor By 9mm July 4, 1944. R. D. AGURCIA I MUSIC LEAF TURNER Filed Dec. 27, 1941 7 Sheets-Sheet 7 7 z w filr M w a 1 w ,H d W W! m I w n m v /2 w W v,,o\ M W .9 E M w a 7 w w k z a MY J J 6 w Z I a .2 v M, a 7 M \a j Wm I. M 10 m 4 w a d x @Q KB 1 m z: a a 65 d 6 v a .l W I M I 7 w 1v m \\\\\\\\\\\v\ z v a v Inventor A Home Patented July 4, 1944 MUSIC LEAF TURNER Roberto Dominguez Agurcia, Comayaguela, D. 0., Honduras Application December 27, 1941, Serial No. 424,641

6 Claims.

My invention relates to improvements in music leaf turners for turning either the leaves of sheet music or bound volumes.

The principal object of the invention is to provide a simply constructed, practical apparatus for automatically turning the leaves of music under control of the foot, so that a musician's hands are left free for use in playing a musical instrument and interruption in playing is obviated. "Other and subordinate objects are also comprehended by my invention, all of which, together with the precise nature of my improvements, will be readily understood when the succeeding description and claims are read with reference to the drawings accompanying and forming part of this specification.

In said drawings:

Figure 1 is a view in side elevation of a preferred embodiment of my improved music leaf turner,

Figure 2 is a view in horizontal section taken on the line 2--2 of Figure 1,

Figure 3 is a fragmentary view in vertical section taken on the line 3-3 of Figure 1 and drawn to an enlarged scale,

Figure 4 is a view in top plan, and drawn to an enlarged scale,

Figure 5 is a detail view in front elevation drawn to an enlarged scale,

Figure 6 is a view in vertical section taken on the line 6-6 of Figure 5,

Figure 7 is a detail view in vertical section taken on the line 1-4 of Figure 5, and drawn to an enlarged scale, with reference to the scale of said Figure 5,

' Figure 8 is a similar View taken on the line 8-8 of Figure 5,

Figure 9 is a view in horizontal section taken on the line 9-9 of Figure 5,

' Figure 10 is a view in plan of one of the hubs for one of the brackets for one of the plate operating bracket arms,

Figure 11 is a view in perspective of one of the tail plates of one of th leaf turning arms,

I Figure 12 is a view in vertical section of one of said tail plates and the pivotal connection of the plate carrying bracket arm thereto,

Figure 13 is a view in transverse section taken on the line l3l 3 of Figure 10,v

Figure 14 is a view in vertical section taken on the line l4l4 of Figure 2 and drawn to an enlarged scale,

tion taken on the line 15-45 of Figure 14 and drawn to an enlarged scale,

Figure 16 is a View in side elevation of the contact wheel,

Figure 1'7 is a view in horizontal section taken on the line ll-l I of Figure 14,

Figure 18 is a view in top plan of a modified embodiment of my improved music leaf turner, adapted for turning the leaves from left to right as well as from right to left,

Figure 19 is a view in bottom plan of the head of the drive shaft of said modified embodiment,

Figure 20 is a view in transverse section taken on the line 2020 of Figure 19 and drawn to an enlarged scale,

Figure 21 is a view in transverse section taken on the line 2l--2l of Figure 18 and drawn to an enlarged scale,

Figure 22 is a view in transverse section taken on the line 22-22 of Figure 18 and drawn to an enlarged scale,

Figure 23 is a view in longitudinal vertical section of a modified embodiment of motor control,

Figure 2.4 is a view in horizontal section taken on the line 24--24 of Figure 23, and

Figure 25 is a view in longitudinal section of another modified form of motor control.

Referring now to the drawings by numerals, and first to Figures 1 to 17, my improved music leaf turner, in its preferred embodiment, has the form of a music rack including a base casting l of tripod form embodying a pair of rear wardly diverging base arms 2 and a forwardly extending elongated motor control box 3 functioning as another base arm, said arms 2 and motor control box 3 radiating from an upright center sleeve 4. Arising from the sleeve 4 is the usual sectional telescopic column including a pair of upper and lower sections 5, 6 relatively adjustable to extend the height of the column. A set screw 1 is provided in the upper section 5 for establishing the desired adjustment of said sections 5, 6. The upper section 5 is provided with a forked upper end 8 through which a transverse pivot pin 9 is extended. Pivotally mounted on the pin 9 for swinging adjustment forwardly and rearwardly is an upstanding bracket plate i0 supporting a motor drive casing l i having a back wall l2, a flat top plate I3, and a detachable front plate I 4 depending below the casing II and extending beyond opposite sides thereof to form a back rest for sheets, or a volume, of music, not shown. Extending along the Figure 15 is a view in vertical transverse secb tt edge f the front plate is a music porting ledge 15. A pair of hanger bars [6 support the ledge adjacent opposite ends thereof and are vertically slidable in suitable guides 11 fixed to the rear side of the front plate 14. Set screws, as at 18, provided in appropriate guides I] provide for locking the guide bars IS in said guides so that the ledge I5 is verticall adjustable into different set positions, as will be clear. A sector I9 is provided on the bracket plate If! to extend through a slot in th upper section 5 and a thumb screw H is extended through said section to be turned against said sector l9, whereby the bracket plate [0 and motor drive casin I I may be adjusted swingably forwardly and rearwardly on the pin 9 into different set positions to dispose the music on the ledge I5 at different angles to the vertical. The pin 9 is equipped with a nut 22 to retain the same in place.

The front plate I4 may be fixed to the motor drive casing H as represented at 23.

Suitably fixed in the motor drive casing, to the back wall l2 thereof, is a reversible type motor 24 arranged with the armature shaft 25 thereof upright. The motor base 26 may be bolted, as at 21, to the wall l2, if desired. Fast on the upper end of the armature shaft 25 is a gear wheel 28 meshing with an elongated, relatively smaller, gear pinion 29 fast on a drive shaft 30. The drive shaft 30 is rotatably and slidably mounted, in upright position, in the top plate l3 with its upper end extending upwardly beyond said plate for a suitable distance and its lower end slidably mounted in a bearing 3| fixed in a transverse ledge 32 provided in the motor drive casing II, the arrangement of the lower end of the drive shaft 30 and the bearing 3| being such that said end and bearing cooperate to limit downward sliding movement of said shaft. A spiral spring 33 sleeved onto the drive shaft 30 between the gear pinion 29 and a washer 34 opposed to the plate l3 yieldingly retains the drive shaft 30 in its downward limit of movement.

Above the top of the motor drive casing I3 is a series of leaf turning, rod-like arms 35 normally located on the right hand side of the drive shaft 30, said arms 35 extending lengthwise longitudinally of the top edge of the front wall l4 and being spaced vertically for clearance and also, in their normal position, being spaced laterally rearwardly from each other so that the top arm is normally rearmost and the remaining arms spaced rearwardly successively and equidistantly. The outer ends of the leaf operating arms 35 have suitably secured thereto leaf clamps 36 of the spring pressed clip type, see Figure 8, arranged to hang pendent from said arms 35 and for manual opening to insert the outer upper corners of leaves of music, as at 31, therein and for lightly gripping such leaves to be easily pulled loose therefrom. The inner ends of the leaf turning arms 35 are rigidly secured to one side edge of a series of flat thin tail plates 38, respectively, which in the normal position of said arms, and as best shown in Figures 4 and 6, are arranged one behind the other in engaging relation and in upright position. The opposite side edges of the tail plates 38 are pivotally mounted on the outer ends of a series of plate carrying arms 39 vertically spaced and pivoted as at 39 at their inner ends to a series of stacked disc-like hubs 40 rotatable about the drive shaft 39. For mounting the tail plates 38 on the plate carrying arms 39, the appropriate side edges of said plates are rabbeted, as at 4|, to provide a horizontal shoulder 42 between which and a right angled keeper plate 43 the outer end of the related plate operating arm is inserted, said keeper plate 43 being provided with a vertical pivot 44 extending through the outer end of said arm 39 so that the tail plate is swingable about a vertical axis on said arm. A screw 45 secures the keeper plate 43 to the tail plate 38, The hubs 49 are equipped with the usual type of anti-friction bearings 46.

A suitable upstanding stop lug 41 on the motor drive casing II is provided for engaging the rear side of the rearmost tail plate 38 so that said plates may be swung to the right, manually, with the rearmost one engaging said stop and the others disposed forwardly of said rearmost one to thereby establish the normal position of the leaf turning arms 35. As best shown in Figure 7, in the normal position of the leaf turning arms 35 the sheet, clamps 3S overlie the right hand end of the ledge l5 for clamping to leaves 31 of music.

On the upper end of the drive shaft 3|] and suitably spaced above the stack of hubs 49 is a disc-like concentric head 48 secured on said drive shaft 33 by a hub 49 and a set screw 50. Extending radially from the head 48 is a radial operating arm 5i having a front padded edge 52 and designed to be swung, clockwise as viewed in Figure 4, over the upper edges of the series of tail blocks 38 in slightly spaced relation to said edges. The operating arm 5| is secured in a rabbet 53 in the head 48 by a screw 54.

Pick-up connections are provided in the tail plates 38 for engagement by the operating arm 5| so that said arm under rotation clockwise will pick up the tail plates 39 successively beginning with the foremost one and swing the same from normal position over to an opposite position at the left hand side of the drive shaft 30, together with the leaf turning arms 35 and the plate carrying arms 39. The pick-up connections comprise pins disposed in vertical sockets 53 in the tail plates 38 and similarly spaced between the side edges of said plates. The pin 54 of the tail plate 38 which is located foremost in the normal position of the parts is fixed and extends above the upper edge of said plate into the path of movement of the operating arm 5|. The pins 55 of the remaining tail plates 38 are spring pressed, as at 39, to be projected upwardly in limited degree above the upper edge of the other tail plates 38 and are adapted to be retracted into said other tail plates 38, manually, out of the path of movement of the operating arm 5|. Each tail plate 38 is provided on the rear side thereof with a stud plate 56 secured thereto by screws 51 and having extending rearwardly therefrom a latching stud 58. The studs 58 on preceding tail plates '38, in the normal position of said tail plates, extend through apertures 59 in succeeding tail plates 38 and into notches 60 in the projectible pins 55 to hold such pins in retracted positions. As will be seen, when each succeeding tail plate 38 is swung away from its succeeding tail plate, the locking stud 58 carried thereby is withdrawn from the notch 60 in the pin of the succeeding tail plate to release said pin for projection under the spring pressure exerted thereagainst.

A cam 6! is provided on the under side of the head 48 for engagement with a roller 82 mounted on top of the motor drive casing II at the left hand side of the drive shaft 39 by means of a bar 63 and screws 64, the arrangement being such that when the operating arm is revolved into a suitable position on the left hand side of said drive shaft 38, said cam 6| will engage said roller 62 and the head 48 will thereby be elevated, together with the drive shaft 38, against the tension of the spring 33, such elevation of said head 48 elevating the operating arm above whichever pins 54, it may be engaged with so that said arm releases said pin and the pick-up connection is broken.

- A suitable stop 85 is provided on the rear side of the front plate M on the left hand side of the drive shaft 38 for engagement by the first tail plate 38 swung over to the left hand side of said drive shaft 38 to establish the limit of turning movement of the foremost leaf turning arm 35. As will be clear, the remaining tail plates 38 will pile up against the foremost one and each other to establish the limits of turning movement of the remaining leaf turning arms 35.

A suitable housing 88 with an open front is provided on top of the motor drive casing H to house the head 48, drive shaft 38, and hubs 48.

Reverting now to the motor control box 3 forming part of a preferred motor control, said box 3 is formed of suitable insulation material and is provided adjacent its inner end with an open bottom chamber 51 adapted to be closed at its bottom. by a plate 68, also of insulation, forming part of said control box 3 and detacha'bly secured thereto, by screws, as at B9. A foot pedal 18 is pivoted, as at 1|, at its front end on top of the housing 3 adjacent the front end of the latter to extend rearwardly above said box and for vertical swinging movement on its pivot H. The rear end of the pedal 18 rests upon a roller 12 mounted on the upper end of an upright rack bar 73 slidably extended downwardly through the top of the chamber 51 with its lower end slidably mounted in an upstanding sleeve 14 on the plate 88. A coil spring i5 in the sleeve 74 urges the rack bar 13 upwardly into a limit of upward movement thereof as established by a pin 16 on said bar adapted to engage the top of the chamber 61. The rack bar 13 has fixed thereto, as by screws 16, within the chamber 8'! a rack plate 11. A horizontal shaft 18 extends across the chamber 8? with its opposite ends mounted by means of anti-friction bearings 18 in opposite sides of the control box 3. Secured on the shaft 18, as at 19', is acontact wheel 88 of insulation having circumferential equidistantly spaced notches 8| therein. An annular commutator plate 82 of conductive metal is suitably embedded in one side of the contact wheel 88 concentrically thereof and provided with outer edge contact fingers 83 bent over the circumference of the wheel 88' intermediate the notches 8| to alternate therewith. A contact roller 84 rides on top of the contact wheel 88 in the vertical center thereof, said roller being carried on one end of a conductor arm 85 having its other end swingably mounted on a horizontal stud 85 extending laterally into the chamber 51 from one side wall of the motor controlbox 3 and secured to said wall by a nut 81 and washer 88. A leaf spring 89 suitably secured at one end to said stud 88 and overlying the conductor arm 85 yieldingly urges said arm 85 downwardly to engage the contact roller 84 with said contact wheel 88. A gear wheel 90 is mounted on the shaft 18 by means of an anti-friction bearing 9| for free rotation on said shaft alongside the side of the contact wheel 88 opposite to that having the commutator 82 thereon, said gear meshing with the rack I8. A one-way drive ratchet and pawl 92, 93 are provided on the shaft 18 and gear 90, respectively, the arrangement being such that when the rack bar 13 is moved downwardly the contact wheel will be rotated and when said rack bar moves upwardly, the gear 98 will idle relative to said contact wheel 88. A suitable spring pressed roller-type brush 94 is mounted by means of a conductor sleeve in one side of the control box 3 so that the roller 98 rides on the commutator 82. The stud 88 and nut 81 and washer 88 form a binding post for a lead 91 forming one side of a motor circuit, not shown. The brush sleeve 95 is designed to be connected 'by a lead 98 to the other side of said circuit.

Referring now to the operation of the described embodiment of the invention, depression of the foot pedal 18 through its bearing on the roller 12 moves the rack bar 13 downwardly in opposition to the spring 75 to effect rotation of the contact wheel 88 clockwise, as indicated by the arrow in Figure 14 to revolve one of the contact fingers 83 under and past the roller 84, said roller then seating in a succeeding notch 8| in said contact wheel 88. As the said contact finger 83 passes under the roller 84, the circuit is closed to the motor 24 in a manner which will be manifest to momentarily energize said motor sufficiently to cause the same to spin and rotate the drive shaft 30 clockwise, as viewed in Figure l, through the medium of the gearing 28, 28.

The leaf turning arms 35, tail plates 38, and plate carrying arms 39 being in the recently described normal position, such operation of the 'drive shaft 38 rotates the head 48, clockwise, to

revolve the operating arm 5| correspondingly. The pins 55 having been manually retracted into latched position in the tail plates 33, with the exception of the pin 54, said operating arm 5! picks up said pin 54 on the foremost tail plate 88 and swings the same from normal position over to the left of the drive shaft 30 against the stop 65 thereby swinging the leaf turning arm of said tail plate to turn the music leaf to which the clamp 38 thereof is attached, the plate carrying arm 39 of said foremost plate 38 being swung around to the left hand side of the driv shaft, as will be clear. Before the foremost tail plate 38 abuts the stop 55, the cam 8| rides over the roller 52 and thereby elevates the lead 48 and operating arm 5| to release the pin 58 of the foremost tail plate 38. As soon as the foremost tail plate 38 is swung away from the succeeding tail plate 38, the stud 58 on said foremost plate 38 is withdrawn from the notch 68 of the pin 55 of the succeeding tail plate 38 and said pin released for projection by its spring 39. Upon another operation of the motor 24, the operating arm 5| picks up the projected pin 55 to swing the second from. the front tail plate 38 over against the foremost tail plate 38 to turn the next leaf attached to the clamp 38 of the related leaf turning arm 35. The remaining tail plates 38 will be swung over to the left successively under successive operations of the motor 24 to turn successive leaves of music in a manner which will be apparent and requires no further explanation.

Referring now to Figures 18 to 21, and 25, illustrating the modified embodiment of my music leaf turner adapted for turning leaves of music from left to right as well as fro-m right to left, in this embodiment the tail plates 98 of the leaf turning arms 99 are provided with fixed pick-up pins I08 of the same height upstanding from the upper edges of said plates but spaced different distances from the inner edges of said plates so that in the normal positions of the plates at the right hand side of the drive shaft IOI, said pins beginning with that of the foremost plate 98 are spaced successively at a greater distance from the axis of the drive shaft IOI. Tail plate carrying arms I02, similar to arms 39, are fixed to the hubs I03, similar to hubs 40, and also fixed to the inner side edges of the tail plates I00. The operating arm I04 is secured, as by screws I05, on top of the head I06 of the drive shaft IOI in radial position.

Endwise slidable in a longitudinal groove I01 in the top of the operating arm I04 is an elongated pick-up slide I08 extending through an end guide I09 on said operating arm, said slide having a depending pick-up rod IIO fixed in its outer end for picking up the pins I00. Threaded longitudinally in said slide I08 and extending out of the rear end thereof is a screw shaft III having its rear end journaled in a split bearing II2 provided on top of the operating arm I04. A gear pinion II3 is fixed on said journaled end of the shaft III in the split of the bearing II2 whereby said shaft III is rotatable by said pinion and prevented from endwise movement. The pick-up slide I08 is normally positioned on the operating arm I04 so that the pick-up rod IIO under clockwise rotation of said arm picks up the pick-up pin I of the foremost tail plate 98.

Suitably fixed in the housing II4, corresponding to housing 66, is an arm II5 extending forwardly radially of the drive shaft I00 and ineluding a front end extension barrel II6 secured thereto by screws Ill and forming a bearing for an upright stud II8 slidable therein and forming an axial reduced extension of said drive shaft IN. A nut on the stud II8 turned against the head I06 secures the head on the stud II8. On the under side of the bar H6 is an arcuate toothed rack II9 engaged by the gear pinion II3 when the operating arm I04 is rotated into a rearwardly extending position.

The head I06 is provided with a cam I similar to cam 6| for engagement with a roller I2I, similar to roller 62, to elevate the head I06 and operating arm I04 so that the pick-up rod IIO will release the pick-up pins I00. The cam I20, in this instance, is dovetailed, as at I22, into a dovetail quadrant edge slot I23 formed in the bottom of the head I06, one side of the slot being formed by an arcuate keeper plate I24 mortised into the bottom of said head I06 and secured thereto by screws I25.

Referring now to Figure 25, in conjunction with the described modified embodiment of the invention, a motor reversing switch is provided in an open bottomed chamber I26 formed in the outer end of a control box I27, similar to control box 3 previously described, the chamber I26 being closed at its bottom by a base plate I28, similar to base plate 68. The reversing switch is designed to be operated by the front, or heel, end of a foot pedal I29, corresponding to foot pedal I0, said heel end being pivoted, as at I30, to the upper end of an upstanding switch operating rod I3I slidably extending downwardly through the top of the chamber I26 with its lower end slidable in a sleeve I32 upstanding from the base plate I28. A coil spring I33 in said sleeve urges the plunger rod I3I upwardly. A flanged collar I34 fast on said rod I3I engages the top of the chamber I26 and limits upward movement of the plunger rod I3I. The flanged collar I34 overlies one end of a switch lever I35 in the chamber I26 pivoted, as at I36, intermediate its ends whereby under downward movement of the plunger rod I3I the other end of said switch lever is swung upwardly in opposition to a suitably connected coil spring I31 and into engagement successively with a pair of vertically spaced fixed contacts I38, I39. The contacts I38, I 39 are designed to be arranged in the motor circuit, not shown, in any well known manner so that when the switch lever I35 is engaged with the lowermost contact I38 the circuit is conditioned to operate the motor in a direction, here in terms forwardly, to rotate the head I06 and operating arm I04 clockwise, as viewed in Figure 18, and when the switch lever I35 is engaged with the upper contact 39, the motor is reversed to rotate said head I06 and operating arm I04 counterclockwise, as viewed in Figure 18.

It is to be understood in connection with the described modified embodiment of the music leaf turner that, with the exception of the modifi-- cations described, otherwise the construction and arrangement is the same as set forth in the preferred embodiment of the invention.

Describing now the operation of the modified embodiment, with the tall plates 98, leaf turning arms 99, and plate carrying arms I02 in the normal position described with reference to the preferred embodiment, if the heel end of the foot pedal I29 is depressed to move the plunger rod I 3| downwardly in opposition to spring I31 to operate the switch lever I35 into engagement with the lower contact I38, and the motor then energized momentarily in the manner already described with reference to the preferred embodiment, the head I06 and operating arm I04 will be rotated clockwise, as viewed in Figure 18, and the pick-up rod IIO will pick up the pickup pin I00 of the foremost tail plate 98 and swing said plate, and arms 99, I02 over to the left hand side of the drive shaft IOI thereby turning a music leaf from right to left. As the music leaf nears fully turned position, the cam I20 will ride over the roller I2I, said cam being slid, in this operation, to one end of the slot I23, and the head I06 and operating arm I04 will be raised to release the pick-up pin I00 of said foremost tail plate 98. As said arm I04 rotates past the rack I09, the gear pinion II3 engages said rack and is thereby rotated, such rotation of said pinion turning the screw shaft III to feed the pick-up slide I08 and rod IIO outwardly of said arm I04 into a position such that the rod IIO, under a second rotation of said arm I04, will pick up the pick-up pin I00 of the succeeding tail plate 98 to perform a similar leaf turning operation. These operations may be repeated under successive rotations of the operating arm I04 until all desired music leaves are turned, as will be apparent.

Now, if it is desired to turn the music leaves back from left to right, the heel end of the pedal I29 may be further depressed to, in a manner which will be clear, to engage the switch lever I 35 with the upper contact I39, and the motor energized in the manner already described, whereupon said motor will operate reversely to rotate the head I06 and the operating arm I04 counterclockwise, as viewed in Figure 18. Under such counterclockwise rotation of said arm I04 the pick-up rod IIO will engage the pick-up pin I00 furthest from the drive shaft IOI, which pin will now be on the foremost tail plate 98 and the left hand side of the drive shaft IOI, and said rod -IIO will swing said plate with its arms 99, I02 .from'left to right to correspondingly turn the foremost left hand music leaf, it being understood that in this operation, the operating arm I04 must be started from the left hand side of the rack I 09 after the last right to left hand turn has been made. As the turned sheet nears its fully turned position, the cam I20 engages the roller I2I and is slid to the other end of the slot I23 .bysuch engagement, after which it rides over theroller I2I and the pick-up rod H is released from the pin IOI, just as previously describedr Under asecond rotation of said operating arm. I04, after the releasing operation just described, the gear pinion I I3 engageswith rack I I9 and rotates the screw .shaft III to retract the pick-up slide I08 into a position such that the pick-up rod IIO will pick up the succeeding or next pin I06 and the next leaf will be turned from right to left. The manner in which the remaining leaves may be turned from right to left will be clear from the foregoing.

Referring now to Figures 23 and 24, a modified embodiment of motor reversingswitch is shown therein for use alongside the motor control box 3 either attached thereto or detached therefrom, as desired.

The modified embodiment of motor reversing switch comprises an elongated rectangular casing straddling the guides I whereby said bar. I 52 is'vertically movable. A central guide stud I54 depends from thebar I52 into a guide sleeve I55 upstanding from the bottom of the casing I50, said stud being backed by a coilspring I56 in the guide sleeve I55 urging said stud I54 and ,40

bar I52 upwardly. A wear plate I56 surrounding the stud I54 is provided on the bottom of the bar I52 to prevent the latter from engaging the sleeve I55. A foot operative plunger rod I51 is slidably extended downwardly through a sleeve I58 in the top of the casing I50 with its lower end threaded through a wear plate I59 and into the bar I52, said plate I59 being suitably attached to said bar. The plunger rod I51 is provided with a head I60 for engagement by the heel of 1 an operator. A pair of insulation posts I6I depend from the top of the casing I50 upon opposite sides of the plunger rod I51 which, it should be explained. is located in the center of said casing I50. capped by a pair of carbon contacts I62.

A pair of conductor rods I63, I63 extend upwardly from the contacts I62, I62 through the posts I6I to a pair of binding posts I64, I64 on the top of the casing I50. A pair of contacts, such as known at I65, I65, extend through the bar I52 in vertical alignment with the contacts I62, I62, and are normally engaged with the latter under the urge of the spring I66. A pair of conductors I66, I66 extend from the contacts I65, I65, within the bar I52, with ends extending through the top of said bar, said con.- ductors being connected by a pair of leads I61, I61 to a pair of binding posts I66, I68 on the top of the casing I50. A pair of contacts I69, I69 are provided in the bottom of the casing I50 The lower ends of the posts I6I are in vertical alignment with the contacts I65, I65

to be engaged with the latter under depression of the bar I52. In the top of the casing I52 is a pair of conductor members I10, I10 at opposite ends of said top, respectively. The line I1I extends from the source of power, not shown, to the binding post I68 and a similar line I12 to the binding post I68. A line I13 extends from binding post I64 and a line I65 from the binding post I64. A line I14 extends from the source of power. The switch is designed for use with a three-phase induction type motor and the lines I1I, I12, I14 to be connected in the usual manner to the motor field. Contact I10 is connected to. contact I69 by a line I15 and said contact I10 is connected to line I65 by a line I16. Contact I 10 is connected to contact I19 by a line I 11 and contact I10 is also connected to line I13 by a line I18. The previously described motor switch in motor control box 3 is connected with the line I14, as represented at I19.

In the normal position of the reversing switch, themcontactsl65, I65 are engaged with the con- 'tacts I62, I62 and disengaged from contacts I69, I69. Switch I19 being closed, the current flows, by Way of line I1I, post I68, lead I61, .conductor I66, contact I65, contact I62, conductor I63, post I64, and line I13 to one side of one phase of the motor field, and to the other side of said phase by way of line I 12, post I68, lead I61, conductor I 66, contact I65, contact I62, conductor I63, and lead I65. The motor is then conditioned for rotation in one direction. To reverse the motor, the foot plunger I51 is depressed to lower the bar I52 and disengage contacts I65, I65 from contacts I62, I62, and engage thesame with contacts I69, I69. The current now flows to one side of the one phase of the motor field-by way of line I1I, post I68, lead I61, conductor .166, contact I65, contact I69, line I15,.conductor member I10, line I16, and line I65. Current is supplied to the other side of said one phase by way of the line I12, post I68, lead,I61,'conductor I66, contact I65, contact I69, line I11, conductor member I10, line I18, and line I13. Thus the direction of fiow of the current is reversed in one phase of the motor field and the motor caused to operate in a reverse direction.

The foregoing will, it is believed, suflice to impart a clear understanding of my invention without further explanation.

Manifestly,'other modifications of the invention than those herein described may be resorted to without departing from the inventive concept, and right is herein reserved to such other modifications as fall within the scope of the subioined claims.

What I claim is:

1. In a motor operated music leaf turner, a tripod-type base including elongated base members radiating from a common center and one comprising a forwardly extending motor control box, a depressible foot pedal surmounting sa d box, a column arising from said base in said common center, means at the top of said column for supporting leaves of music to be turned, a casing in the rear of said means, a reversible motor in said casing, leaf turning means on top of said casing operative in opposite directions under forward and reverse operation of said motor to turn said leaves in opposite directions, and a pair of motor energizing and reversing switches, respectively, disposed in said box and operative selectively under depression of said pedal.

2. In a motor operated music leaf turner, means to support leaves of music to be turned and including a back rest, a motor casing in the rear of said rest, an upright drive shaft in said casing, rotatably mounted and having an upper end extending out of the casing above said rest, a motor in said casing operatively connected to said shaft, a series of leaf turning units above said rest rotatable from normal position about said extending end of the drive shaft to thereby turn said leaves, and means to rotate the units of said series successively under rotation of said drive shaft including an operating arm mounted on said drive shaft for rotation thereby above said series of units.

3. In a motor operated music leaf turner, means to support leaves of music to be turned and including a back rest, a motor casing in the rear of said rest, an upright drive shaft in said casing, rotatably mounted and having an upper end extending out of the casing above said rest, a motor in said casing operatively connected to said shaft. a series of leaf turning units above said rest rotatable from normal position about said extending end of the drive shaft to thereby turn said leaves, means to rotate the units of said series successively under rotation of said drive shaft including an operating arm mounted on said drive shaft for rotating thereby above said series of units, and pick-up connections on units of said series, respectively, for engagement by said arm.

4.111 a motor operated music leaf turner, means to support leaves of music to be turned and including a back rest, a motor casing in the rear of said rest, an upright shaft in said casing, rotatably mounted and having an upper end extending out of the casing above said rest, a motor in said casing operatively connected to said shaft, a series of leaf turning units above said rest rotatable from normal position about said extending end of the drive shaft to thereby turn said leaves, means to rotate the units of said. series successively.under rotation of said drive shaft including an operating arm mounted on said drive shaft for rotation thereby above said series of units, and pick-up connections on units of said series, respectively, for engagement by said arms comprising pins constructed and arranged for projection into the path of rotation of said arm, said pins being spring pressed for projection and arranged for retraction out of said path, and means on said units for releasably retaining said pin retracted in the normal position of the units and releasing the pins unde r rotation of the units from normal positgm.

5. In a motor operated music leaf turner, means to support leaves of music to be turned and including a back rest, a motor casing in the rear of said rest, an upright drive shaft in said casing. rotatably mounted and having an upper end extending out of the casing above said rest, a motor in said casing operatively connected to said shaft, a series of leaf turning units above said rest rotatable from normal position about said extending end of the drive shaft to thereby turn said leaves, means to rotate the units of said series successively under rotation of said drive shaft including an operating arm mounted on said drive shaft for rotation thereby above said series of units. and pick-up connections on said arm and units, respectively, including a member shiftable on said arm into different positions thereon as an incident to repeated rotation of the arm, and pins on said units arranged to intercept said member in the different positions thereof, respectively.

6. In a motor operated music leaf turner, means to support leaves of music to be turned including a back rest, a motor casing in the rear of said rest, an upright drive shaft in said casing rotatably mounted and endwise movable, a motor in said casing operatively connected to said shaft, a series of leaf turning units above said rest rotatable from normal position about said extending end of the shaft, to thereby turn said leaves, means to rotate said units of said series successively under rotation of said drive shaft including an operating arm mounted on said drive shaft for rotation thereby above said series of units, said means including pick-up connections on said units arranged to intercept said arm, said arm being movable under endwise movement of said shaft in one direction to clear said pick-up connections when said units have turned said leaves, and means to move said shaft in said direction under rotation thereof.

ROBERTO DOMiNGUEZ AGURCIA. 

